Backport PR pandas-dev#50562: CI Ipython ci fixup again

Author: MarcoGorelli

pandas/io/formats/printing.py

@@ -263,7 +263,10 @@ def enable_data_resource_formatter(enable: bool) -> None:
 
             class TableSchemaFormatter(BaseFormatter):
                 print_method = ObjectName("_repr_data_resource_")
-                _return_type = (dict,)
+                # Incompatible types in assignment (expression has type
+                # "Tuple[Type[Dict[Any, Any]]]", base class "BaseFormatter"
+                # defined the type as "Type[str]")
+                _return_type = (dict,)  # type: ignore[assignment]
 
             # register it:
             formatters[mimetype] = TableSchemaFormatter()